Get Current Time with kernel Timer

RE: Get Current Time with kernel Timer

Tal. — Tue, 18 Jul 2023 08:45:23 GMT

I just call the function k_uptime_get one time in my code. Thats why I get the same time, when I print the time

RE: Get Current Time with kernel Timer

Sigurd Hellesvik — Mon, 17 Jul 2023 14:19:55 GMT

Good to hear that you were able to solve it Tal!

Are you able to share how you solved your problem?

RE: Get Current Time with kernel Timer

Tal. — Mon, 17 Jul 2023 14:09:02 GMT

Thank you. I find the problem and solve it.

Thanks anyway

RE: Get Current Time with kernel Timer

Sigurd Hellesvik — Mon, 17 Jul 2023 07:00:49 GMT

Hi Tal and Louis,

Thank you a lot for the answers Louis, we appreciate that the community is helping out!

Tal, DevZone is a public forum as you know, and not all that answers are Nordic Employees.
Louis is not a Nordic employee, so if I make the case private, he can no longer see the case.

Instead of making the case private, I suggest that you take one of our samples, for example zephyr/samples/hello_world and re-create the issue in this sample.
This has two advantages:

You will be able to share code in a public case.
Creating a minimal sample is a good way to narrow down what went wrong

If you do so, I will try the sample and see if I can figure out what is wrong.
And if Louis want to, he can have a look as well.

Does that work for you?

Regards,
Sigurd Hellevik

RE: Get Current Time with kernel Timer

Tal. — Fri, 14 Jul 2023 17:03:27 GMT

If you turn the ticket to privat, it would be better and than I can post a part of my code.

Is it possible?

RE: Get Current Time with kernel Timer

nordicator_prim3 — Fri, 14 Jul 2023 16:21:26 GMT

It should not restart because of exiting the idle thread. That is interesting. Are you able to post your code? Are you using any power savings modes or something?

RE: Get Current Time with kernel Timer

Tal. — Fri, 14 Jul 2023 08:36:48 GMT

thank you for your answer.

enclosed you can see my output. As you can see I have output currenttime. However, with both the system restarts, so that the same number is printed out. After "Tasks_sleep_mode" my system ist entering the IDLE Thread and is waking up with an interrupt. In my Interrupt i am printing the current time. Does the timer starts again after getting out of the IDLE Thread?

RE: Get Current Time with kernel Timer

nordicator_prim3 — Thu, 13 Jul 2023 21:14:41 GMT

Hello,

k_uptime_get() does not reset when you use it. Is it saying "0" every time? I'm guessing youre looking at it with a printk or LOG_XXX function. If so it's probably just not printing the 64 bit number correctly. For instance,

while(1)
{
    printk("%d\n", k_uptime_get());
    k_msleep(1000);
}

Would print "0" every time because the %d is not expecting a 64 bit number. It's only printing the upper 32 bits which is 0 until 4,294,967,295 milliseconds have elapsed.

If you do this instead:

while(1)
{
    printk("%"PRIu64"\n", k_uptime_get());
    k_msleep(1000);
}

Then it will print the correct values. Or you could use this if you dont need all 64 bits:

while(1)
{
    printk("%d\n", k_uptime_get_32());
    k_msleep(1000);
}